Search Results
You are looking at 1 - 6 of 6 items for :
- Author or Editor: G. A. Anderson x
- HortScience x
Abstract
Stock plants of Chrysanthemum morifolium Ramat. cv. ‘Bright Golden Anne’ lighted continuously from September 30 to May 15 with Multivapor and Lucalox lamps (100 W/m2) produced more cuttings than those receiving only seasonal daylight and photoperiod lighting. High intensity supplementary lighting improved cutting quality by increased fresh and dry weight and stem diameter. Cuttings from plants receiving high intensity lighting rooted in fewer days, had greater root fresh and dry weights, and greater top fresh weight than plants lighted photoperiodically. After transplanting, the cuttings given high intensity light became established more rapidly and developed into flowering plants of higher quality.
Abstract
Costs were estimated for vegetatively producing plants of broccoli (Brassica oleracea L. (Italica group) through tissue culture with 3 culture stages and growing the plants 7 weeks in the greenhouse to field transplant size. The analysis was based on producing 11,000 finished transplants per week. Unit costs were estimated at 11.6¢ for tissue culture production of each plantlet and an additional 3.8¢ greenhouse cost for growing to transplant size.
Abstract
Continuous high intensity supplementary lighting from October to March with a combination of Lucalox and Multivapor lamps at 116W/m2 reduced the number of days to root vegetative cuttings of chrysanthemum, geranium and poinsettia and increased root number, length, and fresh weight over non-lighted cuttings. Lighting benefits were lost at 174W/m2 when foliar chlorosis developed and delayed rooting and reduced root growth. Leaf temperature of misted cuttings receiving 116W/m2 and 174W/m2 of supplementary light on sunny December days were 2.7° and 5.1°C, respectively, higher than non-lighted leaves.
Abstract
The addition of 1.0% (wt/vol) ammonium peroxydisulfate to 0.125%, 0.25%, and 0.50% (wt/vol) ethephon sprays, applied before harvest to rutabaga (Brassica napus, Group Napobrassica Mill. cv. Laurentian) nearing commercial size, defoliated a greater percentage of leaves than would be anticipated from the effects of the individual components. Defoliation expressed on the logit scale was a linear function of the square root of the ethephon concentration, if ethephon was applied with or without ammonium peroxydisulfate. Chemical name used: (2-chloroethyl) phosphonic acid (ethephon).
Abstract
The rhizomes of 3 cultivars of tall bearded irises (Iris spp.)—‘Cayenne Capers’, ‘Babbling Brook’, and ‘Stepping Out’—were stored at 2°C for 9, 14, and 18 weeks and then forced to anthesis in a greenhouse. During vernalization, rhizomes were either planted into pots or placed on cooler shelves. Rhizomes of ‘Cayenne Capers’ required no vernalization to develop the flower bud, yet vernalization was required for ‘Babbling Brook’ and ‘Stepping Out’. The longer the vernalization period, the shorter the time to flower after being removed to the forcing environment. Rhizomes not planted during vernalization required more time to flower than those which were planted.
Abstract
Individual plants of 3 cultivars of peas (Pisum sativum L.)—‘Early Frosty’, ‘Darkskin Perfection 70A’, and ‘Puget 715’—were harvested to derive the plant yield components: numbers of filled pods, seeds/pod, seeds/plant, and fresh mean seed weight at processing maturity. These cultivars differed for number of filled pods, seeds/pods, and seeds/plant, but not for mean fresh seed weight. Following the conversion of yield component data to the log scale, a sequential yield component analysis was conducted via serial inclusion in a multiple regression equation. Both forward and backward sequential yield component analyses were computed. Across the 3 cultivars, the yield component contributing most to plant variation was pod number in both the forward and backward analysis. Contributions of the yield components to the total yield variation, ranked in declining order of importance for the forward analysis, were number of pods (73.6%), seeds/pod (13.6%), and weight/seed (12.9%). Backward analysis did not change the ranking, and the respective percentages were 47.9%, 40.6%, and 11.5%. Yields estimated through yield components were 7% to 14% higher than those measured from harvested plots.